Please help me understand!

I have a question about how the calorie counting works. The phone app. does it plainly and makes sense to me. What I am referring to is the "other" section in the Activity Log. This section tells you the BMR (how many calories you burn just being you) and it is separately added in aside your activities you enter. The web site, however, does not make this adjustment. I am wondering what is going on and if the website is inaccurately counting my calories burned because of this. I am very confused and the fact that this could have been miscalculated from the start haunts me.. Someone please help me understand this.